package com.hmdp.utils;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //只要第一个拦截器顺利执行完 存储到了ThreadLocal 线程
        if (UserHolder.getUser()==null) {
            //没有 拦截
            response.setStatus(401);
            return false;
        }

        return true;
    }
}
